regular expression: match any word until first space

Question

I have the following line:

hshd    household   8/29/2007   LB

I want to match anything that comes before the first space (whitespace). So,

Answer 1

Derived from the answer of @SilentGhost I would use:

^([\S]+)

Check out this interactive regexr.com page to see the result and explanation for the suggested solution.